Magnetic ordering in Th3P4-type Tb4Sb3 compoundстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The nature of the magnetic ordering of Tb4Sb3 compound (Th3P4-type, cubic; cI28, space group I ¯43d, No. 220, a = 0.91518(7) nm) has been investigated by using the techniques of magnetization and neutron diffraction. AC and DC magnetisation measurements indicate antiferromagnetic ordering at 108K in zero magnetic field that is accompanied by a field-induced metamagnetic transition to a ferromagnetic state, in fields above 0.3 T. Neutron diffraction experiment in zero applied magnetic field shows that below TN = 112(4)K Tb4Sb3 exhibits an antiferromagnetic flat spiral-type ordering with propagation vector K1 = [±1/8, ±1/8, ±1/8]. The magnetic moment of Tb atoms is found to be MTb = 6.7(3) mB at 80 K. The magnetic moment of Tb atoms lie in the (1 1 1) plane of Tb4Sb3 unit cell (the cone axis arranges along [1 1 1] direction with cone angle β =90◦). Below TN2 = 50 K, Tb4Sb3 shows second antiferromagnetic transition withK2 = [1/2, 1/2, 1/2] with possible re-orientation of Tb magnetic moments.